AUTHOR=Liangming Cai , Xiaoqiong Cai , Min Du , Binxin Miao , Minfen Lin , Zhicheng Zeng , Shumin Li , Yuxin Ruan , Qiaolin Hu , Shuqin Yang 

TITLE=OSA Patient Monitoring Based on the Beidou System

JOURNAL=Frontiers in Public Health

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2021.745524

DOI=10.3389/fpubh.2021.745524

ISSN=2296-2565

ABSTRACT=This system allows OSA patients to get timely rescue when they are sleepy outside. This system uses the popular IoT framework.
At the bottom is the data acquisition layer, which uses wearable sensors to collect vital signs from patients, with a focus on ECG
and SpO2 signals. The middle layer is the network layer that transmits the collected physiological signals to the Beidou indicator
using the Bluetooth Low Energy (BLE) protocol. The top layer is the application layer, and the application layer uses the mature
rescue interactive platform of Beidou. Since the GPS indicator has not included the communication satellite, So it has no SMS
function. OSA patients can only passively wait for a rescue. Moreover, due to the lack of satellites in Asia and the insufficient
density of the ground-enhanced system, the positioning error of OSA patients is large. The Beidou system developed by China itself,
the main coverage of the satellite is in Asia, and is equipped with a high-density ground-based augmentation system. Therefore,
the Beidou model improves the positioning accuracy and is equipped with a special communication satellite, which increases the
short message interaction function. Therefore, patients can report disease progression in time while waiting for a rescue. After
our simulation test, the effectiveness of the OSA patient rescue monitoring system based on Beidou system and the positioning
accuracy of OSA patients have been greatly improved. Especially when OSA patients work outdoors, the cell phone base station
signal coverage is relatively weak. The satellite signal is well covered, plus the SMS function of the Beidou indicator. Therefore, the
system can be used to provide timely patient progress and provide data support for the medical rescue team to provide a more
accurate rescue plan. After a comparative trial, the rescue rate of OSA patients using the detection device of this system was
increased by 15 percentage points compared with the rescue rate using only GPS satellite phones.